阅读说明：本技术 一种阳树脂再生工艺 (Cation resin regeneration process ) 是由 陈文元 龙津达 徐伟 于 2019-09-02 设计创作，主要内容包括：本发明提供一种阳树脂再生工艺,属于水处理系统中阳树脂再生技术领域,该一种阳树脂再生工艺具体包括以下步骤：阳树脂再生塔连接备用；阳树脂的第一次大反洗；盐溶液的配制注入；阳树脂的第一次小反洗；盐酸溶液的配制注入；阳树脂的第二次小反洗；阳树脂的第二次大反洗；阳树脂的大正洗；水质的检测。本发明的一种阳树脂再生工艺对现有阳树脂再生工艺进行了改良,盐溶液可以除菌,除有机物,彻底让阳树脂失效,阳树脂的再生用盐酸,它的氧化能力很弱,不会破坏树脂结构和氧化树脂,从树脂上解析下来的离子大多都形成可溶性氯化物,便于用水清洗操作方便,减少对树脂的污染,提高了再生效率,延长了阳树脂的使用寿命。(The invention provides a cation resin regeneration process, which belongs to the technical field of cation resin regeneration in a water treatment system, and specifically comprises the following steps: connecting the cation resin regeneration tower for later use; first large backwashing of the cation resin; preparing and injecting a salt solution; a first small backwash of the male resin; preparing and injecting a hydrochloric acid solution; a second small backwash of the male resin; second large backwashing of the cation resin; performing large direct washing on the cation resin; and (5) detecting the water quality. The cation resin regeneration process provided by the invention is improved on the existing cation resin regeneration process, the salt solution can remove bacteria and organic matters, the cation resin is completely disabled, the cation resin regeneration hydrochloric acid has weak oxidation capacity, the resin structure and the oxidized resin are not damaged, most of ions resolved from the resin form soluble chlorides, the cation resin regeneration process is convenient to clean with water, the pollution to the resin is reduced, the regeneration efficiency is improved, and the service life of the cation resin is prolonged.)

1. The cation resin regeneration process is characterized by comprising the following steps:

the method comprises the following steps: connecting the cation resin regeneration tower for later use;

step two: first large backwashing of the cation resin;

step three: preparing and injecting a salt solution;

step four: a first small backwash of the male resin;

step five: preparing and injecting a hydrochloric acid solution;

step six: a second small backwash of the male resin;

step seven: second large backwashing of the cation resin;

step eight: performing large direct washing on the cation resin;

step nine: and (5) detecting the water quality.

2. The process for regenerating a positive resin as claimed in claim 1, wherein in the first step, a water circulating pipe is connected to the resin inlet of the positive resin regeneration tower to ensure the connection to be sealed against water leakage.

3. The regeneration process of the male resin as claimed in claim 1, wherein in the second step, the valve of the water inlet is fully opened by the first large backwashing of the male resin, so that the water flows in and out, and the backwashing time is controlled to be 10 to 20 minutes, so that the compacted resin is in a fluffy state.

4. The process for regenerating a cationic resin according to claim 1, wherein in step three, the preparation and injection of the salt solution comprises the following steps:

s301: selecting salt raw materials: salt raw materials with the salt purity degree set between 90% and 95% are selected and added into a salt solution preparation box.

S302: mixing and stirring salt solution: ultrapure water was poured into the salt solution preparation tank, and stirring and mixing were performed for 20 minutes to 30 minutes.

S303: and (3) detection of the concentration of the salt solution: and detecting the concentration of the salt solution by using a salt concentration detector with the model of LR-ZDJ to ensure that the cation resin is used for regeneration.

S304: and (3) injecting a saline solution: and pumping qualified salt solution into the cation resin regeneration tower through a suction pump.

S305: soaking of resin: and soaking the cation resin in the salt solution for 25 to 35 minutes, wherein the liquid inlet flow rate of the dilute regeneration solution is 3 to 5 BV/h.

5. The process for regenerating cationic resin according to claim 1, wherein in step four, said half-open water inlet valve is operated to allow water to flow in and out from the lower part of the tank, and the salt is washed clean by back washing for 10 to 30 minutes.

6. The regeneration process of cation resin according to claim 1, wherein in the fifth step, the preparation and injection of the hydrochloric acid solution comprises the following steps:

s501: selecting a hydrochloric acid raw material: 10% dilute sulfuric acid solution is selected.

S502: mixing and stirring of hydrochloric acid solution: stirring and uniformly mixing the sulfuric acid solution.

S503: detection of the concentration of the hydrochloric acid solution: and detecting the concentration of the salt solution by using a salt concentration detector with the model of LR-ZDJ to ensure that the cation resin is used for regeneration.

S504: injection of hydrochloric acid solution: and injecting the qualified hydrochloric acid solution into a cation resin regeneration tower to soak the cation resin.

S505: acid solution soaking of resin: soaking cation resin in a hydrochloric acid solution for 15 to 25 minutes, washing with dilute sulfuric acid, converting the dilute sulfuric acid into dilute regeneration liquid in an ion exchange resin column, regenerating the dilute regeneration liquid as the next ion exchange resin, reducing the dosage of the regeneration liquid by half, and regenerating the D001(732) macroporous strong acid cation exchange resin, wherein the pertinence is strong, the regeneration efficiency is high, the recovery degree of the ion regeneration resin is as high as 90 to 98 percent, the utilization rate of the regeneration liquid is greatly improved, the regeneration cost is obviously reduced, and the resin performance is well recovered.

7. The regeneration process of the male resin as claimed in claim 1, wherein in step six, the male resin is backwashed for the second time, a water inlet valve is half opened, water flows in and out from the lower part, and the time of the small backwashing is controlled to be 10 minutes to 20 minutes.

8. The regeneration process of the cation resin as claimed in claim 1, wherein in the seventh step, the second large backwashing of the cation resin is carried out by fully opening the water inlet valve, and the water flows downwards and upwards, and the large backwashing time is controlled to be 25 minutes to 30 minutes.

9. The regeneration process of cation resin as claimed in claim 1, wherein in step eight, the cation resin is subjected to a large positive washing, a water inlet valve is fully opened, water flows in and out from the top, the time of the large positive washing is controlled to be 30 minutes to 40 minutes, and sampling detection is performed.

10. The process for regenerating a cationic resin as claimed in claim 1, wherein in the ninth step, the regenerated cationic resin and the ultrapure water are tested.

Technical Field

The invention belongs to the technical field of regeneration of cation resin in a water treatment system, and particularly relates to a cation resin regeneration process.

Background

The ion exchange resins adopted in the field of softened water treatment are commonly sodium type ion exchange resins and hydrogen type ion exchange resins, sodium chloride and acid are respectively adopted as regenerants during regeneration, and a small amount of reports also adopt a method of regenerating by using sodium sulfate; hydrochloric acid and sodium chloride have certain influence on the environment, and chloride ions have corrosiveness on stainless steel equipment, so that the resin softening equipment can only adopt chloride ion resistant materials such as glass fiber reinforced plastics, stainless steel lining rubber and the like, and cannot be manufactured by adopting the stainless steel materials; the sodium sulfate regeneration mode is easy to generate precipitate.

After the ion exchange resin (iorreisin) is used for a certain period of time, the adsorbed impurities are close to saturation, and then a regeneration treatment is carried out, and ions and other impurities adsorbed by the resin are eluted and removed by chemical agents to restore the original composition and performance.

In practical application, in order to reduce the regeneration cost, the amount of the regenerant is properly controlled to restore the performance of the resin to the most economical and reasonable regeneration level, and the performance recovery degree is usually controlled to be 70-80%. If higher regeneration levels are to be achieved, the amount of regenerant is increased substantially and the availability of regenerant is reduced. The invention discloses a regeneration method with lower relative cost, which has the advantages of high regeneration level, less consumption of regeneration liquid, high utilization rate of the regeneration liquid and low regeneration cost.

The chemical reaction in the regeneration of the resin is the reverse reaction of the original exchange adsorption of the resin. According to the chemical reaction equilibrium principle, the concentration of a certain substance in the chemical reaction is increased, and the reaction can be promoted to proceed to the other substance, so that the regeneration reaction can be accelerated by increasing the concentration of the regeneration liquid, and a higher regeneration level can be achieved.

The invention discloses a Chinese patent with a publication number of CN105080624B, and the name invented and created is a method for regenerating ion exchange resin, which is characterized by comprising the following steps: 1) backwashing: introducing dilute regeneration liquid from the bottom of an ion exchange resin column, backwashing the ion exchange resin in the column, soaking for 25-35 minutes, converting the dilute regeneration liquid in the column into concentrated regeneration liquid, discharging the obtained concentrated regeneration liquid to a concentrated liquid collecting tank by using compressed air, wherein the liquid inlet flow rate of the dilute regeneration liquid is 2-4 BV/h, and the using amount of the dilute regeneration liquid is 1 time of that of the bed body; 2) washing in a normal way: and (2) introducing 10% dilute sulfuric acid from the top of the ion exchange resin column, wherein the liquid inlet flow rate is 1-2 BV/h, the using amount of the 10% dilute sulfuric acid is 1 time of that of the bed body, the dilute sulfuric acid is converted into dilute regeneration liquid in the column body, the dilute regeneration liquid is discharged to a dilute liquid collecting tank, residual liquid is emptied, and the regeneration of the ion exchange resin is completed.

However, the existing cation resin regeneration process has the problems of low regeneration efficiency, short service life of the resin and complex flow operation.

Therefore, the invention of a cation resin regeneration process is very necessary.

Disclosure of Invention

In order to solve the technical problems, the invention provides a cation resin regeneration process, which aims to solve the problems of low regeneration efficiency, short service life of resin and complex flow operation of the existing cation resin regeneration process. The cation resin regeneration process specifically comprises the following steps:

the method comprises the following steps: connecting the cation resin regeneration tower for later use;

step two: first large backwashing of the cation resin;

step three: preparing and injecting a salt solution;

step four: a first small backwash of the male resin;

step five: preparing and injecting a hydrochloric acid solution;

step six: a second small backwash of the male resin;

step seven: second large backwashing of the cation resin;

step eight: performing large direct washing on the cation resin;

step nine: and (5) detecting the water quality.

Preferably, in the first step, a circulating water pipe is connected to a resin inlet of the positive resin regeneration tower, so that the connection is ensured to be sealed and water leakage is prevented.

Preferably, in the second step, the first large backwashing of the positive resin is carried out, the valve of the water inlet is fully opened, so that the water flows in and out, and the backwashing time is controlled to be 10 minutes to 20 minutes, so that the compacted resin is in a fluffy state.

Preferably, in step three, the preparation injection of the salt solution comprises the following steps:

s301: selecting salt raw materials: salt raw materials with the salt purity degree set between 90% and 95% are selected and added into a salt solution preparation box.

S302: mixing and stirring salt solution: ultrapure water was poured into the salt solution preparation tank, and stirring and mixing were performed for 20 minutes to 30 minutes.

S303: and (3) detection of the concentration of the salt solution: and detecting the concentration of the salt solution by using a salt concentration detector with the model of LR-ZDJ to ensure that the cation resin is used for regeneration.

S304: and (3) injecting a saline solution: and pumping qualified salt solution into the cation resin regeneration tower through a suction pump.

S305: soaking of resin: and soaking the cation resin in the salt solution for 25 to 35 minutes, wherein the liquid inlet flow rate of the dilute regeneration solution is 3 to 5 BV/h.

Preferably, in the fourth step, the water inlet valve is half opened, water flows downwards and upwards, and backwashing is carried out for 10 to 30 minutes, so that salt is cleaned.

Preferably, in step five, the preparation injection of the hydrochloric acid solution comprises the following steps:

s501: selecting a hydrochloric acid raw material: 10% dilute sulfuric acid solution is selected.

S502: mixing and stirring of hydrochloric acid solution: stirring and uniformly mixing the sulfuric acid solution.

S503: detection of the concentration of the hydrochloric acid solution: and detecting the concentration of the salt solution by using a salt concentration detector with the model of LR-ZDJ to ensure that the cation resin is used for regeneration.

S504: injection of hydrochloric acid solution: and injecting the qualified hydrochloric acid solution into a cation resin regeneration tower to soak the cation resin.

S505: acid solution soaking of resin: soaking cation resin in a hydrochloric acid solution for 15 to 25 minutes, washing with dilute sulfuric acid, converting the dilute sulfuric acid into dilute regeneration liquid in an ion exchange resin column, regenerating the dilute regeneration liquid as the next ion exchange resin, reducing the dosage of the regeneration liquid by half, and regenerating the D001(732) macroporous strong acid cation exchange resin, wherein the pertinence is strong, the regeneration efficiency is high, the recovery degree of the ion regeneration resin is as high as 90 to 98 percent, the utilization rate of the regeneration liquid is greatly improved, the regeneration cost is obviously reduced, and the resin performance is well recovered.

Preferably, in the sixth step, the second small backwashing of the cation resin is performed, the water inlet valve is half opened, the water flows downwards and upwards, and the small backwashing time is controlled to be 10 minutes to 20 minutes.

Preferably, in the seventh step, the second large backwashing of the cation resin is carried out, a water inlet valve is fully opened, water flows downwards and upwards, and the large backwashing time is controlled to be 25 minutes to 30 minutes.

Preferably, in the step eight, the cation resin is subjected to large forward washing, the water inlet valve is fully opened, the water flow enters from top to bottom, the time of the large forward washing is controlled to be 30 minutes to 40 minutes, and sampling detection is performed.

Preferably, in the ninth step, the regenerated cation resin and ultrapure water may be detected.

Compared with the prior art, the invention has the following beneficial effects: because the cation resin regeneration process improves the existing cation resin regeneration process, the selection of the regenerant is very important for the normal operation of the ion exchange process and the improvement of the effluent quality; the regeneration effect of the resin and the quality of the treated water are directly influenced by the type and the quality of the regenerant; the salt solution can degerming, removes the organic matter, thoroughly lets positive resin inefficacy, and the hydrochloric acid is used in the regeneration of positive resin, and its oxidizing power is very weak, can not destroy resin structure and oxidized resin, and the ion that the resolution got off from the resin all forms soluble chloride mostly, and the water of being convenient for washs convenient operation, reduces the pollution to the resin, has improved regeneration efficiency, has prolonged the life of positive resin.

Drawings

FIG. 1 is a flow chart of a cation resin regeneration process.

Figure 2 is a flow chart of a saline solution dispensing infusion process.

Fig. 3 is a flow chart of the process of preparing and injecting the hydrochloric acid solution.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

as shown in the attached figure 1, the cation resin regeneration process specifically comprises the following steps:

the method comprises the following steps: connecting the cation resin regeneration tower for later use;

step two: first large backwashing of the cation resin;

step three: preparing and injecting a salt solution;

step four: a first small backwash of the male resin;

step five: preparing and injecting a hydrochloric acid solution;

step six: a second small backwash of the male resin;

step seven: second large backwashing of the cation resin;

s108: performing large direct washing on the cation resin;

s109: and (5) detecting the water quality.

In the above embodiment, specifically, in S101, the circulating water pipe is connected to the resin inlet of the positive resin regeneration tower, so as to ensure the connection to be sealed and prevent water leakage.

In the above embodiment, specifically, in S102, the first large backwashing of the positive resin is performed, the valve of the water inlet is fully opened, so that the water flows in and out, and the backwashing time is controlled to be 10 to 20 minutes, so that the compacted resin is in a fluffy state.

As shown in fig. 2, in the above embodiment, specifically, in S103, the preparing and injecting of the salt solution includes the following steps:

s301: selecting salt raw materials: salt raw materials with the salt purity degree set between 90% and 95% are selected and added into a salt solution preparation box.

S302: mixing and stirring salt solution: ultrapure water was poured into the salt solution preparation tank, and stirring and mixing were performed for 20 minutes to 30 minutes.

S303: and (3) detection of the concentration of the salt solution: and detecting the concentration of the salt solution by using a salt concentration detector with the model of LR-ZDJ to ensure that the cation resin is used for regeneration.

S304: and (3) injecting a saline solution: and pumping qualified salt solution into the cation resin regeneration tower through a suction pump.

S305: soaking of resin: and soaking the cation resin in the salt solution for 25 to 35 minutes, wherein the liquid inlet flow rate of the dilute regeneration solution is 3 to 5 BV/h.

In the above embodiment, specifically, in S104, the water inlet valve is half opened, water flows downward and upward, and backwashing is performed for 10 to 30 minutes, so that salt is washed clean.

As shown in fig. 3, in the above embodiment, specifically, in S105, the preparing and injecting of the hydrochloric acid solution includes the following steps:

s501: selecting a hydrochloric acid raw material: 10% dilute sulfuric acid solution is selected.

S502: mixing and stirring of hydrochloric acid solution: stirring and uniformly mixing the sulfuric acid solution.

S503: detection of the concentration of the hydrochloric acid solution: and detecting the concentration of the salt solution by using a salt concentration detector with the model of LR-ZDJ to ensure that the cation resin is used for regeneration.

S504: injection of hydrochloric acid solution: and injecting the qualified hydrochloric acid solution into a cation resin regeneration tower to soak the cation resin.

S505: acid solution soaking of resin: soaking cation resin in a hydrochloric acid solution for 15 to 25 minutes, washing with dilute sulfuric acid, converting the dilute sulfuric acid into dilute regeneration liquid in an ion exchange resin column, regenerating the dilute regeneration liquid as the next ion exchange resin, reducing the dosage of the regeneration liquid by half, and regenerating the D001(732) macroporous strong acid cation exchange resin, wherein the pertinence is strong, the regeneration efficiency is high, the recovery degree of the ion regeneration resin is as high as 90 to 98 percent, the utilization rate of the regeneration liquid is greatly improved, the regeneration cost is obviously reduced, and the resin performance is well recovered.

In the above embodiment, specifically, in S106, the second small backwashing of the cation resin is performed, the water inlet valve is half opened, the water flow enters and exits from the bottom, and the small backwashing time is controlled to be 10 minutes to 20 minutes.

In the above embodiment, specifically, in S107, the second large backwashing of the cation resin is performed, the water inlet valve is fully opened, the water flow enters and exits from the bottom, and the large backwashing time is controlled to be 25 minutes to 30 minutes.

In the above embodiment, specifically, in S108, the cation resin is subjected to a large forward washing, the water inlet valve is fully opened, the water flow enters from top to bottom, the time of the large forward washing is controlled to be 30 minutes to 40 minutes, and the sampling detection is performed.

In the above embodiment, specifically, in S109, the regenerated cation resin and ultrapure water may be detected.